Kwan et al. (64) genotyped tagging and candidate SNPs of SCN1A, 2A, and 3A in 471 Chinese patients with epilepsy and reported a significant correlation between an intronic SNP in SCN2A (IVS7-32A>G, rs2304016) and responsiveness to various ASDs, but the polymorphism did not significantly alter SCN2A mRNA levels in resected brain tissue or peripheral white blood cells. Here, SCN1A is linked to epilepsy.